package io;

import java.io.*;

/**
 * 使用缓冲流完成文件的复制操作
 *
 * 缓冲流:
 * java.io.BufferedInputStream和BufferedOutputStream
 * 缓冲流是一对高级流,在流连接中的作用是提高读写字节数据的效率.
 */
public class CopyDemo3 {
    public static void main(String[] args) throws IOException {
        FileInputStream fis
                = new FileInputStream("e:/Git.exe");
        BufferedInputStream bis
                = new BufferedInputStream(fis);

        FileOutputStream fos
                = new FileOutputStream("e:/Git_cp.exe");
        BufferedOutputStream bos
                = new BufferedOutputStream(fos);
        int d;

        long start = System.currentTimeMillis();
        while((d = bis.read())!=-1){
            bos.write(d);
        }
        long end = System.currentTimeMillis();
        System.out.println("复制完毕!耗时:"+(end-start)+"ms");

        bos.close();
        bis.close();

    }
}
